A bit of an apology on this one. Stereoview cards have a curve to them. The card stock on this one is thick, and so even after putting a couple of books on top, I still couldn't get the card flat, so the focus isn't as good as it should be.
There is a caption on the back, "The widely known cemetery is situated on Gowanus heights and covers an area of 474 acres. The number of bodies interred up to July, 1896, was 290,000 or an average of about 5,000 per annum since it was opened."
The Keystone View Company was founded by B.L. Singley in 1892 in Meadville, Pennsylvania, and finally went under in 1963. Keystone originally specialized in humor and entertainment but eventually pivoted to educational imagery.